Gang-edger.



No. 70 0,203. Patented May 2'0-7 |902.

' C. .l0HNSON.

valum EDGER.

(Application filed Nav. 5, 1901.)

(No vModel.) 4 Sheets-Sheet Km wwf/6AM@ No. 700,203. I Patented May 20,|902.

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G A N G E D G E B (Application led Nov. l5, 1901.)

(N0 Model.) 4 Sheets-Sheet 2,

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. No. 700,203. Patented may 20, |902.

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(Applicatign led Nov. 5, 1901 (N0 Model.) 4 Sheets-Sheet 3.

Patented May 20, |902.

C. JDHNSON.

G A N G E D G E B (Application led Nov. 5, 1901.)

4 Sheets-Sheet 4,

(N0 Model.)

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PATENT OFFICE.

CHARLES JOHNSON, OF MINNEAPOLIS, MINNESOTA, ASSIGN OR OF ONE- HALF TOARTHUR R. ROGERS, OF MINNEAPOLIS, MINNESOTA.

eANe-EDGER.

SPECIFICATION forming part of Letters Patent No. 700,'2'03, dated May20, 1902. Application filed November 5, 1901. Serial No. 81,174. (Nomodel.)

edgers, andhas for 'its object to improvethe same in the 'severalvparticulars hereinafter noted. l

The invention consists of the novel devices and combinations of deviceshereinafter de-` scribed, and defined in the claims.

The principal objects of my invention are to provide, rst, means'wherebyone of the saws may be adjusted laterally with respect to the other,and, second, to provide bed-rollers and floating overhead or presserrollers, the latter of which as well as the former may be positivelydriven, while free for vertical movements.

The invention is illustrated in the accompanying drawings, whereinlikecharacters indicate like parts throughout the several views. Y

Figure 1 is aplan view of a gang-edger embodying the several features ofmy invention. Fig.2 is what maybe termed a front elevation of themachine. Fig. 3 is an end elevation of the same looking from the lefttoward the right with respect toFig.v 2. rear elevation of the machine,some parts being broken away. Fig. 5 is a vertical section approximatelyon the line m5 :e5 of Fig. 1. Fig. 6 is a detailin transverse verticalsection on the line of Fig. 5.

The bed-plate 1 of the machine is shown as supported by legs 2. At itsforward central portion the bed 1 is provided with a projectingyoke-like bracket 3, to which is rigidly secured one end of a guide-bar4, the rear end of which bar is secured to the depending portion of saidbed l. On the bed 1 are rigidly secured two pairs of vertically-extendedguide yokes or brackets 5, in which bearing-blocks 6 are mounted forvertical adjustments. Said blocks G are provided with screw-threadedFig. 4 is a` stems 7, whichwork freely through the top bars of saidyokes 5. Above said bars the said stems 7 are provided with stop-nuts 8,and below said bars they are provided with springs 9, which assistgravity in yieldingly holding said vbearing-blocks 6 pressed downward. Aface-plate 10 is suitably supported from the bed 1.

In each pair of bearing-blocks 6 is mounted the shaft 11 of a heavypresser-roller 12. Mounted `in suitable bearings 13, just below eachroller l2, is the shaft'14 of a similar 'roller 15.. The shafts 14 are'provided at their rear ends with spur-gears 16, which mesh with'similar' gears 17 on their roller shafts 1l Said gears 16 and 17 havevery long teeth,

ablejextent, as will be necessary in their feeding action on lumber ofdifferent thicknesses.

Heavyroller-s'upporting arms or levers 18 are pivoted `at theirouterends t0 brackets 19, which, as shown, are' adjustably secured tothe projecting ends of the face-plate 10 by the bolts 20, that workthrough slots` 21 in said brackets and are screwed into said face-plate.The intermediate portions of the transverselyopposite levers 18 arerigidly connected in pairs by tie-bars 22, which are provided at theirprojecting ends with set-screws 23, and which screws engage the tops ofthe brackets 5 and serve as stops to limit the downward movements ofsaid levers. At their inner free ends the levers 18 are formed with abearing 24. In the bearings 24 of each pair of levers 18 is mounted Jdieshaft'25 of a heavy iloating presser-roller 26. The shafts 25 on theirrearwardly projecting ends are provided with sprocket-wheels 27, overwhich a sprocketchain 28 is mounted to run.

29 indicates a chain-tightening. wheel for the chain 28, which issupported by a post 30, that rises from the bed 1.

The saws 31and32 are carried bya telescopically-adjustablc spindle 3334. The eX- terior spindle-section 33 is loosely journaled IOO tion 33,holds the said spindle-section against endwise movement with respect tothe adjustable head 35. The saw 32 is, as shown, detaehably heldinposition on the inner end of the sleeve-section 33 by a n ut 3S, whichpresses against a washer 39 and forces the saw against a collar 40,fixed on lihespindle-section 33. In a similar manner the saw 31 isdetachably secured on the spindle-section 34 by a nut 41, which pressesthe washer 42 against said saw and in turn presses said saw against afixed collar 43 on the said spindle-section 34. Said spindle-section 34has annular grooves at its outer end, which are adapted to be engaged bya bushing of Babbitt or otherdevice to hold said spindle against endwisemovement, but free for rotation, within a bearing 44, secured on thebed 1. The outer and adjustable spindle-section 33 telescopes over thesection 34 and is provided with key-lugs 45, which work in longitudinalgrooves 4G, cut in the spindlesection 34. In this manner the twospindlesections are caused to rotate together.

The bearing-head 35 .is adapted to be adjusted by a screw-rod 47, whichis free to rotate, but fixed against endwise movement, in abearing-plate 48, secured at the end of the supporting-bracket 3 of thebed 1. This rod 47 works through a nut 49 on the bearinghead 35, and atits outer end it is provided with a hand-crank 50, by means of which itmay be turned.

The saw-spindle is given its motion from a belt 51, which runs over thepulley 37 and is driven fromasuitable source. (Notshown.) A wide-facedpulley would usually be employed to-drive the belt 5l andpermitofsuchlateral movements thereof as are necessary under theadjustments of the bearing-head 35.

Motion is imparted to the feed-rollers from a power-driven belt 52,which runs over a pulley 53 on a counter-shaft 54, mounted in suitablebearings 55 on the left-hand legs 2. This shaft 54 is provided with awide-faced pulley56, over which and a pulley 57, secured on the shaft 14of one of the lower feed-rollers 15, runs a belt 58.

59 indicates a loose or idle pulley mounted on the said roller-shaft 14by the side of the pulley 57, and onto which the belt 58is adapted to bethrown when it is desired to throw the rollers out of action.

The two lower feed-rollers 15 are caused to rotate in the same directionby sprocketchain 60, which runs over sprocket-wheels 61, secured on theshaft 15. The shaft 11 of one of the rollers 12 is provided with asprocket G2, over which and a sprocket 63 on the shaft 25 of one of thefioating rollers 2G runs a sprocket-chain 64. By the connections justdescribed positive motion is imparted to all of the feed-rollers and theadjustments of the adjustable members are not interfered with.

By means of the set-screws 23 and the nuts 22, respectively, theoverhead rollers 26 and 12 may be adjusted for proper action on theparticular boards which are being fed to the saws.

As has already been made clear, the adjustable saw 32 may be moved toand from the saw 31 at will and while the machine is in action, so as toadapt the saws to vary the width of the boards which are to be sawed.The means for accomplishing this result is simple and efficient.

The above statements are based upon the use of a full-sized workingmachine.

It will of course be understood that while I have used specific termsand have described the machine in detail that the same is capable ofmany modifications within the scope of my invention.

What I claim, and desire to secure by Letters Patent of lthe UnitedStates, is as follows:

1. The combination with means for feeding the boards, of a spindleformed by two shaftsectionsv which telescope one into the other and areconnected for common rotation, independent bearings for said twoshaft-sections, a saw carried by each shaft-section, and means foradjusting one of said shaftsections with respect to the other tovariably space the saws.

2. In a gang-edger, the combination with means for feeding the boards,of a telescopically-adjustable rotary spindle, one section of which isfixed against endwise movement, a saw carried by each spindle-section,and an adjustable bearing-head in which said adjustable spindle-sectionis mounted, means for adjusting the bearing-head, and means for drivingsaid spindle, substantially as described.

3. In a gang-edger, the combination with means for feeding the boards,of a telescopically-adjustable rotary spindle, the sections of whichhave sliding spline-and-feather engagement and one section of which isfixed against adjustment, a saw carried by each spindle-section, apulley on the adjustable spindle-section, an adjustable bearing-head inwhich said adjustable spindle-section is mounted, and a screw foradjusting the said head, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES JOHN SON.

Witnesses:

ELIZABETH KELIHEP., F. D. MERCHANT.

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